Sticker for door stock



Jim 23, 1925.

I 1,543,158 W. C HOBART ET AL STICKER FOR noon swdcx Fild Jan. s, 1325 4 Sheets-Sheet, 1

a M fl v nwnfoz (Enema 1 June 23; 1925.

c. HOBART ET AL STICKER FOR DOOR STOCK Filed Jan. 5, 1,925 4 Emacs-Sheet 2 if k;

W. C. HOBART ET AL STICKER FOR DOOR STOCK Filed Jan. 5, 1925 4sheetssheet 5 iwmxol M a C INHIHIIIIUI TIN!i'iillWIWWIIIIIIIIIHI June 23, 1925. 1,543,158

w. c. HOBART ET AL STICKER FOR no owswocx Filed Jan. 5, 1925 I 4 Shets-Sheet 4 x I I: s s s s s s /////////////////////////////////'/////A Patented June 23, 1925.

umrao srATEs PA r| :1-r r v i WILLIAM c. HOBART ANDTBEDERICK a itronor soiv; or raoom, WAS NGTON.

{STICKER FOR DOOR STOCK.

Application filed January 5, 1925. Serial No. 569.

To all whom it may concern:

Be it known thatwe, WILLIAM C. HOBART and FREDERICK A. NICHOLSON, citizens of the United States, and residents of Tacoma, in the county of Pierce, State of Washington, have invented certain new and useful Improvements in Stickers for Door Stock, of which thefollowing is a specification.

This invention relates tov Woodworking machinery and especially to that class known as door stickers.. The objeot'of such a machine is to form the edges of the stock to the desired molded or straight shape for the stiles and rails used to make the frames between which the thinner panels are ecured to form doors. 7 The object of this inventionis to provide a machine which is capableof being speeded .upzto run several timesfaster than the usual rate for machines of this character; and a :further object is to provide such a machine in which stock which is slightly bent edgewise may be. run and used in the manufacture of doors. Another object is to provide a machine which may be quickly and easily adjusted and which is adapted to operate on stock which is made of a plurality'ofthicknesses of-wood, glued together, to form the desired thickness for the door stiles or-rails. Y a

We attain these and other objects by the devices, mechanisms and arrangements illustrated in the accompanying drawings, in which r Fig. l is a front elevation of-the complete machine;

Fig. 2 is a central vertical cross-section thereof, viewed fromthe left-end of the machine and showing, hoWever,;the motors and cutter heads in dotted lines in order to reveal the motor supporting and adjusting means; I

Fig. 3 is a diagrammatic view of the gearing for driving the feed rollers, as viewed fromthe rear; 1 j 7 Fig. 4 isa vertical section of a part of the frame showing the main; set. of gears lfor drivingthe feed rollers;

Fig. 5 is a plan of a partiofthe machine showing the means for guiding the stock being worked onlas it is'fed through .the machinegand I I "I Fig. 6 is a section of a portion of the feed roller pressingfand,controlling'means.

Similar numerals of reference refer to similar parts. throughout the several views.

The standard .form of sticker is not adapted for high speed. work for several reasons and does not work so fast that it cannot be tended by one man at each end feeding stock or removing the finished material. If, however, the speed of the machine is to be further increased it is necessary that it shall.

work faster than is practical for any man to feed, in other words 'it'must be automati-' cally fed and dispose of the finished stiles or; rails automatically. The first requirement, therefore, of a high speed machine is that the stock :need not be handled in being fed thereinto but may be delivered thereto by means of a hopper, traveling belt, or otherrautomatic means. Therefore themachine must workon the stock when it is lying flatten the table and'not on edge as in the usual machines of this character.-

The machines now in use have anumber of practical defects, when it comes to opcrating. at high speeds, which we have succeeded in eliminating bymaking certain improvements. and changes in the mechanisms and arrangements of the parts of such a machine. These changes are, in part, as follows :.-We pass the stock through the machine lying flat instead of on edge. This enables us to have the axes of the cutter heads and of the feed rollers at right-angles to each other, insteadof parallel, and we therefore do not have to use toothed drive wheels against the edge of the stock but we use pairs of rollers, in vertical alignment, on each side of the vstock, using two such pairs of rollers on the feed side of the machine and one pair on the delivery side thereof.

These-rollers are smooth facedandengage' usual construction. This arrangement also permits of a positive deliver of the last piece 0t. stock in a: batch there y preventing its stopping as soon as it has passed'the-feed rollers and while still in engagementhwithi...

the cutter head. and. thus preyenting the knives from burning the wood at the point where the stock stopped. This; cannot done, without damaging the finished edge of the stock, on machines which feed by-enev gaging the edge of the stock. I

Since the: feed) rollers and th'ecutter heads are on axes at right angles-to each other, it is: possible and convenient to: use direct electric drive for the: several parts, one motor being used to feed the stock to the machine andaway' therefrom, and twov other: motors, rotating in opposite directions, being usedv toidriyeithe two cutter heads which are: directly connecte'd thereto: and which operate onthestock-to formtheedges thereofas. it passes: therethrough. Thus it will" be seenthatthe three driven parts are entirel independent or each other though normally the two: cutter head motors are wired to controlled: together. This enables LlSAtOuIllllthe cutter heads at a very high rate, 3,600; revolutions penininute, or more, and; to drive the stock. through the: machine at amuclr higherrate. than has heretofore been possible or practicable, increasing this feed from a rate of sixtyto one-h=undred andrfizfty feet per minute The. change in the: position oii'the stocknecessitates, 0t course, that the cutter heads berotated on vertical axes. The said cutter heads are placed in alignment exactly across the width of the stock, thus workingsimul taneously on two'. opposite points thereot and thus preventing any distortion of the: cut surface due to any: irregularity. in-thealignment of the edges of-the stock: in: other words the twoedges are out exactly paralleli with eachother-whetherthe stock is slightly curved by warping-or is straight; Thi'safact enables us to use a: large numberof otherwisedefective pieces because their width is uniform and they can be assembledindoorsunden pressure, oppositely warpeda. pieces being; used'on; opposite. edgestofithe door and allv straightened. under pressure and glued thus: together to. produce a straight door, thus using up waste pie'cesi 01% stock. This cannot be done when the cutterheads are not in alignment across the stock,as in the ordinary arrangementof such machines, because as the warped piece passes through the: machine its amount of" offset from the straight line; varies; aslthe 'respe'ctiyerportions reach. the. two; cutter. headsiand' this makes, a stile or: railof varying width which cannot be used in. a door. This particular teature. is furthertaken" carev otby the) means; we; use in guiding the: stock through the machine as particularly illustrated in Fig. 5.

Further difference is found inthe fact that though one cutter head and the corresponding guide parts are all simultaneously and, eq ially, adj istable yet the reecr'mechanism is fixed in its position, not

beingadj sted to diiferent widths of stock, thus eliminating one source of trouble in the operation; oisuch; a machine.

A further change is found that though one cutter' head be adjustedhorizontally equallya-nd simultaneously with the table and guides yet both cutterwheads may also be: independently and quickly adjusted, botli horizontally and: vertically, without the operatorhaving to pass around the machine, all said' adjustments of each of the cutter heads being made atone place.

Again, a. turther change is made the general form of thefmachine in which. the massive base holds allithe cutting and guideing parts at on below: the working level: o t the table, thusamaking these parts free from vibration and: also placing thenr in: positions convenient for use, for adjustment, vfor inspection and repair or-replacement, while that part oft-he machine which is above the level of the working-tablecgentainsionly'the feed: motor and: the apparatus.connected with driving and; controllingtheipressure of the feed rollers.

Another change is-found in the mechanism by Whichthe pressure of thefeed rollers on 'thei stock is regulated and whereby their motion is. limited. and: controlled; all the; movable membersiof' the pairs of. feed rollers being: equally and simultaneously; adjusted as to their pressure and therl iinits of their action, and may: also be independentlyadjusted. as to their pressure on thelstock; Therefore, if the thickness'ofthe stock. tobefed in themachine changesfrom time to time, all the feed rollers -can be equ'allywadjusted to take care of the change in thickness whereby the actual pressure will: be kept the same, if desired, in spite of'the ch-angein thickness. a

Referring now to the drawings, it .will be seen that the baseioli the machine is provided witha single bedeplate: 1 on. which two pedestals 2 and 3 are securely fastened.v The ped'estalQzis ontheifeedsideof the machine and; the pedestal 3 is on the delivery side thereof. The pedestals 2 and 3 are spaced apart to. provide room for the two vertical electric cutter head moto'rst and 5'. A rear table 6 extends in one stru'cture-i roin end: to end of the: machine and is secured to both-the pedestals 2 and. 3: and is formed with i an' opening 71 through which i the: rear motor 4, with its arbor and cutter: head 8, projects. i I T A front. table 9 also extends; f ro'nrend' to:

end of the machine in one single structure and is slidably mounted on top of both of the said pedestals 2 and 3 and has its working surface in the same horizontal plane as the Working surface of the said rear table 6. The'front table 9 is provided with an opening 10 for the front motor'5 and its cutter head 11 and also with arched bridges 12 which span over the portions of the three lower feed rollers which are not in engagement with the stock passing through themachine. The said front table is guided in its motion towards or away from the rear table 6 by suitable means engaging in the parallel slots 13 in the pedestale and may be secured in any adjusted position by means of the hand wheel clamps 14. The slots 13 extend rearward from the front of the machine at right-angles to the direction of the feed of the stock. The table 9 ismoved in the slots 13 towards or away from the axis of feed, when the clamps 1 1 have been loosened, bymeans of a suitable screw shaft 15 engaging it and the bracket 16 secured to the pedestal 2.

Each of the motors 4 and 5 is mounted on independent carrier plates 17 which are vertically movable between guides 18 forming art of the horizontally movable carriages 19 and 20 which are mounted between horizontal guides 21 formed on the'inner vertical'surface of the said pedestal 2. The vertical adjustment of each of the two motors 4 and 5 is similar andqcomprises a nut 22 mounted on the back of the plate17 and engaging a vertical screw 23 which is mounted. in the carriage 19 or 20. The screw 23 isrotated by a pair of spiral gears 24, one of which is secured to: the screw 23 and the other of which is slidably mounted on the operating shaft 25 or 26. The shaft 25 operates the gears for the rear carriage 19 and the motor a while the shaft 26 performs the same function for the front carriage 20 and its motor 5. These'shafts 25 and 26 are mounted in the pedestal'2and' extend suit-able distances inward from the front. Each shaft is squared at its'end to receive the usual operating wrench handle.

Thus by turning the shaft 25 the rear cutter head 8 can be raisedor lowered independent of its horizontal adjustment, and by turning the shaft 26 the front cutter head 11 can be similarly adjusted independent of its horizontal position.

The rear carriage 19 may be horizontally adjusted by means of a screw shaft, 27, mounted in the pedestal2 in similar manner as the shafts 25 and 26, and engaging a nut 28 secured to the'said carriage 19.

Thus the horizontal position of the rear cut ter head 8, motor 4:, and carrier plate 17 may be adjusted by rotating the shaft 27 The front carriage 20 may be horizontally moved'to adapt it for use with different widths of stock and to adjust it relatively to shaft 29 engaging a nut 30 on the carriage,

thus adjusting the horizontal position of the cutter head 11 independently of its vertical adjustment and also independently of the adjustmentof the front table 9, as above described. But, it is usually desired to move both thetable 9 and the'cutter head 11 equal amounts without disturbing their relative positions. In order to accomplish this we mount a sprocket gear 31' on the above described screw shaft 15, which controls the position of the sliding table 9, and connect it to a similar sprocketwheel 32, loosely mounted on thesaid screw shaft 29, by means of a sprocket chain 33. The sprocket wheel 32 is provided with clutch teeth on its inner face while complementary teeth are formed on the adjacent face of arclutch disk 34 which is fixedly mounted on the said screw shaft 29. Thus when the sprocket'32 is in engagement with the disk 34 any rotation of the screw shaft 15 will make a table 9 andits cutter head' ll will be equal t and the adjustments of the said parts will not be in anyway altered. 7

The feed mechanism comprises pairs of wide rollers, one roller of each pair'being fixedly mounted in the pedestals 2 or 3, while the other of each pair is mountedon spring depressed carriers which permit the said roller to rise and fall with changes in the thickness of the stock being fed in the machine. As all these pairs are similar one only will be described, it being understood thatthere' are two pairs feeding the'stock tothe cutterheads and one pair drawing it awaytherefrom" a The lower feedroller 35 is mounted in bearings 36 in the pedestal. These bearings are preferably provided with an inclined adjustment arranged to approximately correspond withthe motion of the center of the stock which the machine can take, and the movable'table 9 spans over each of the said rollers 35 by means of arched bridges 12 Theupper feed roller is inountedin a swinging frame or'cradle"38,' pivoted at 39 to theupper extension of the pedestal? 2.-

or 3. This frame 38 and pivot 39 are: ar-

ranged so that there is but very slight 1on "gitudinal motion of the point of contact of 1 the roller 37 with the stock with different extending lengthwise along the machine and mounted i i-brackets 42on the frame=40. Thisshaft 41 has-three sets of. screw-threads 43 cut thereon at suitable positionsand each of these screw-threads: engages a thread out in the interior of a surrounding sleeve 44,.so that by turning; the shaft 41. the said. sleeves 44. are moved longitudinally. Inthe particular machine. described,v two of. these threads are right-handed. and one left-handed. in order that. the motions of all" three of the sleeves 44 may make corresponding and equal. adjustments because two of the rollers 37 are mounted to the rightof. their pivots 39 while one ismounted. to the left-thereof.- The sleeves 44 do not rotate, being, held: therefrom. by a part of the hereinafter de scribed mechanism. Each sleeve is screwthreaded onits outer surf-ace at one end' to receive the hand adjusting wheel 45 which.

screws thereon and fixes. or adjuststhe position of the spring cup. 46 on thesaid sleeve 44. Thepressurespring 47 iswoundaround the sleeve 4.4- and is compressed between thesaidicup46and another cup.48.formed on orv adjacent. to the sliding headv 49. A- fixed stop ,50 is. secured to the sleeve 44 on the other sideof the head 49 and is. shown for clearness as pinned theretobut is preferably screwed thereon and therefore adjustable- The head. 49 is preferably square and slides freely on the sleeve 44 but engages it by means of a key and slot (notshown) in the: usual. Way, thereby holding the sleeve from turning; Vertical: grooves. are. provided. on: the sides of. thehead 49, near its center, and are engaged: by suitable riders. mounted on. the. tinesf5l' of. the forked, lever which. is pivoted. at 52. to the. extension! 40. A lever 53 is attached tothe pivot- 52. and extends out therefrom. over the frame 38,. carrying: the roller 37,. and is attached thereto by a. link 54. Therefore from the above description itisreadily understood that, the pressure of each. of. these three springs 471s independently controlled by the: adjustment of its hand wheel: 45. but that the pressure of allot the rollers 37 may. be. correspondingly' increased or diminished by rotating the. shaft 41, thus moving all. of the. sleeves 44 with their hand wheels 45f-eq uall amounts and therefore: changing the pressure of the respective. springs. Also therotation of the Shaft. 41 moves the. stops 5.0, withlthesleeves 44,.and therefore adjuststhe position of the rollers 37 when there is no; stock being fedunder them. In practice the pressure of the rollers 37 isadjusted so that the roller next toand feeding towards the cutter heads a gages the stock witha considerably greater force than either ot theother tworollers- All therol-lers 35 and 37 are rotated at exactly the same speed. by the following mechanism. A feed motor 55 is mounted on the extension 40 of: the pedestal. 2,, and drives a pinion which engages and" drives the large main gear wheel 5?: to'which. the second pinion: 58 is attached. This second pinion engages and drives the the second large gear" 59 to-which the smaller distributing gear wheelr 60 is attached. Theshait of these wheels 59 and 60 is concentric with: but detached from. the pivot pin. 39 of the roller carrier frame 38: and there tore all adjustments ofthe roller 371, d ue to variations in the thickness of the stock; are made about the central. axis 0,1. these. wheels. The wheel. 60 meshes with: three other wheels of equal size, the upper two, 61, being mounted on the shafts .of the two feed rollers 37,. while the. third wheel 62 formsthe distributing.wheel.for the lower feed; rollers 35, meshing with thetwo equal gears. 63 on the shafts of. the said rollers 35. The. rollers and. 37 to. draw the stock away from the cutter heads, after it has passed them, are interconnected by corresponding gears 60, 61,62 and. 63 and they are driven by means ofa. sprocket chain 64. connecting asprocketwheel 65, on theshaft of one of thezlower rollers 35, with. the corresponding sprocket wheel 66 on the shaft. ofthe de livery feed roller 35. 7

Thus itwill be seen that the stockfed through the machine and. delivered there from. is driven by rollers which engage its. entire width, which turn atexactly the samerates, and which are mounted in. pairs, the rollers of which engage the stockin vertical. alignment. Also that the pressure of the rollers is regulated individually and collectively and is resilient in its nature;

Referring now principally to Fig. 5 wherein the stock guiding means is illus trated. This machine is intended particularly for use on. built up stock, that. is to say on. stock comprising a core with layers 'of' veneer or ply wood. on. its outer flat faces and therefore, if the plywood should happen. to be poorly glued .to the core' at any point of its extreme edges, which are cutby the knives of the cutter head,'.,the said'knives may tear the veneer and spoil the resulting. stile. In order to prevent this action we form the tables 6 and 9 so as to. remain in contact with the under sideof the stock as it passes thetwo cutter heads8r'and 11 and we also provide, complementa-ry. pressure shoes 67 which engage 7 a pair of the upper side ofv the stock immediately over the edges of'the said tables 6 and 9. Said shoes 67 aremounted on rods 68 ,(Fig. 2) which are pressed down by springs,.not shown, in the vertical cylinders 69, the pressure thereof being regulated by the hand wheels 70. The said cylinders 69 are each supported by one of the hereinafter described lateral guide plates.

The lateral guides for the stock comprise a plurality of fixed adjustable guide plates on the rear side of the stock and spring actuated guide wheels on the front side thereof. Each guide plate is provided with slots through which the bolts or studs which secure it to the table 6 or 9 pass and by which it may be adjusted-in position. The guide plate 71 is on the delivery 'side of the rear cutter head 8 and engages the finished edge of the stile or rail. The guide plate 72 is on the feed side, of said cutter head 8 and extends a short distance to the right therefrom. The guide plates 73 and 74L extend the guide line on thefeed side from the said plate 72. As shown in the drawings the plate 72 has its guide edge parallel with the direction of motion of the stock through the machine but the plate 73, next to it, is turned. slightly from said parallel position so that its right hand corner is further from the normal straight feed line, while the third plate 7 4. is still further turned from said parallel position and its left hand corner is made contiguous with the right hand corner of the second plate 73. Thus the line of said guide plates may be substantially a curved line ending in a line parallel to the direction of feed. This digression from the straight line is exaggerated in the drawings.

The front edge of the stock is guided by a plate 7 5 on the delivery side of the front cutter head 11 and by two pairs of springactuated guides on the feed side thereof, said spring guides being positioned opposite to the above described guide plates 72 and 73. These spring guides each comprise guide wheels 76 mounted on a yoke 77, which is pivotally mounted on the end of a rod 78. This rod 78 is mounted in a bracket 79 on the table 9 and has a second rod 80 screwed into it and extending there from to the front of the table where it is provided with a hand wheel 81. This rod 80 has a flange or shoulder 82 which is engaged by the end of the spring 83, which therefore presses the guide wheels 76 towards the stock. The outer end of the spring 83 is engaged by the adjustable screw 84 in the bracket. Thus by turning the hand wheel 81 the distance between the wheels 76 and the shoulder 82 is increased or diminished and therefore the spring 83 is more or less compressed between the shou der 2 nd the Screw 4,-

In practice the stock is fed with its ad vancing corner engaging the rear guide plate 74. Since the feed rollers drive the stock in a straight line through the machine, and since the guide plates 73 and 74 are inclined to that line, it is evident thatthe stockis pressed firmly against said guides by the action of the feed rollers. The adjustment of the pressure spring 47 of the first pair of feed rollers is made much lighter than that of the second pair.- There is, of course, avery slight sliding action between the stock and the rollers and this action insuresthat the stock will follow and press against the guide plates as it passes through the machine. If, therefore, a piece of stock which is slightly warped on oneedge is inserted in the machine with the concave edge towards the rear guides 72, 73 and 74 it follows the curved line of the guides with the result that its edges are stillsomewhat curved when it is finished and, since the cutter heads are in alignment, it is of exactly thesame width throughout its length as it would have been if it had been straight. This would not have been the case if theguide plates had been in straight alignment and one cutter head in advance of the other, as in the usual construction of such machines, because one of the cutter heads would have taken a larger bite off its ends than at the center and the other would have taken more ofi the center than at the ends with the result that the moulded edges would have been defective and also the width of the stile or rail would not have been uniform from end to end.

Thus it will be seen that this machine provides a means of working at a much higher rate than any other machine at present made and that bent stock can be used as effectively as straight stock. In practice, however, it is usual to run straight stock at one time and bent stick at another time, the guide plates being slightly adjusted for the condition of the stock. Further, it will be noted that all the cutting and guiding mechanism is mounted in the base of the machine and that the feed mechanism alone is mountedabove the working table. Also that the tables are at a fixed height and no change in height of any working part is caused by a change in the width of the stock being used. There is, of course additional apparatus used on the machine but not illustrated in the drawings as it does not relate to the essential invented matter described above.

Having described our invention, what we claim and desire to secure by Letters Patent is 1. A sticker for door stiles or rails comprising a pair of fixed pedestals; a fixed rear horizontal table mounted on both said pedestals; a movable front horizontal table mounted on both said pedestals and in the same horizontal plane as the fixed table, said front and rear tables being adapted to support the stock to be worked in flat position near its edges in a continuous structure from end to end of the machine; pressure shoes resiliently mounted on the tables and engaging the upper face of the stock adjacent the cutter heads; a pair of independently rotated and adjusted cutter heads, rotating on vertical axes in transverse alignment relatively to-the longitudinal axis of the machine; feed means independently rotated on horizontal axesand engaging the upper and lower fiat horizontal faces of the stock to pass it through the niachine; fixed guide means mounted on the fixed rear table; and resilient guide means mounted on the movable front table whereby the stock is guided between the cutter heads as it is driven thereagainst by the feed means.

2. A sticker for door stiles as set forth in claim 1, wherein said two :cutter heads are mounted on independent motors and both motors are mounted in the inner face of one of the pedestals, whereby vibration of the machine is reduced or eliminated.

3. A sticker for door stiles as set forth in claim '1, wherein said cutter heads are mounted on independent motors and both motors are independently adjustable; together with means for moving the movable table; independent means for moving themotor and cutter head corresponding with said movable table; and releasable means interconnecting the moving means of the table with that of the motor, whereby when said interconnecting means is in action and said table moving means is actuated the motor moving means is equally, simultaneously, and correspondingly actuated.

i. A sticker for door stiles as set forth in claim 1, wherein said feeding means coniprises three pairs of wide rollers, one of each pair fixedly mounted in the pedestal to engage the under face of the stock in the plane of the tables and the other of each pair resiliently mounted in vertical alignmerit therewith and engaging the upper face of the stock; two of said pairs located on one side of and feeding towards the. cutter heads and the third pair located 011 the other side of and drawing away from the cutterheads; together with an independent driving motor and interconnecting gears whereby all of said rol lers are driven at equal peripheral speeds.

WILLIAM o. HOBART. FREDERICK A. NICHOLS-ON. 

